Feeds

MS uses court order to take out Waledac botnet

Zombie network decapitated. For now

The Power of One eBook: Top reasons to choose HP BladeSystem

Microsoft has won a court-issued take-down order against scores of domains associated with controlling the spam-spewing Waledac botnet.

The software giant's order allows the temporary cut-off of traffic to 277 Internet domains that form command and control nodes for the network of compromised machines. Infected (zombie) machines are programmed to regularly poll these control points for instructions and spam templates.

The .com domains, registered in China, will be sin-binned by VeriSign, at least temporarily decapitating the network. Microsoft estimates that Waledac was one of the 10 largest botnets in the US and a major distributor of spam for online (unlicensed) pharmacies, knock-off goods and other tat, as explained in a blog posting by its legal team here.

Waledac is estimated to have infected hundreds of thousands of computers around the world and, prior to this action, was believed to have the capacity to send over 1.5 billion spam emails per day. In a recent analysis, Microsoft found that between December 3-21, 2009, approximately 651 million spam emails attributable to Waledac were directed to Hotmail accounts alone, including offers and scams related to online pharmacies, imitation goods, jobs, penny stocks and more.

The Microsoft lawsuit also accuses 27 as-yet-unnamed defendants of cybercrime offences associated with the Waledac botnet.

Redmond's techies have followed up the legal action with "ethical countermeasures to downgrade much of the remaining peer-to-peer command and control communication" within the botnet, in partnership with its security firm partners.

Operation b49, as Microsoft dubs the Waledac takedown, still leaves the problem of hundreds of thousands of infected PCs, as Redmond readily acknowledges. Clean-up advice including a suggestion to try out Microsoft's malicious software removal tool is included in the bottom paragraphs of a blog post by Tim Cranton, associate general counsel at Microsoft, here.

Criminals running botnets have faced a number of takedown operations over the last year or so, dating back to the McColo shutdown. All normally result in a temporary slowdown in spam volumes. But cybercrooks are getting better at building more resilient networks. Even if that doesn't work, there are always more miscreants in the shadows ready to step in and sell bulk mail services to unethical, unscrupulous or outright criminal marketeers.

Microsoft's enforcement action is welcome, but it treats only the symptoms - and not the root cause - of the botnet epidemic. ®

The Power of One eBook: Top reasons to choose HP BladeSystem

More from The Register

next story
HIDDEN packet sniffer spy tech in MILLIONS of iPhones, iPads – expert
Don't panic though – Apple's backdoor is not wide open to all, guru tells us
Mozilla fixes CRITICAL security holes in Firefox, urges v31 upgrade
Misc memory hazards 'could be exploited' - and guess what, one's a Javascript vuln
BMW's ConnectedDrive falls over, bosses blame upgrade snafu
Traffic flows up 20% as motorway middle lanes miraculously unclog
LibreSSL RNG bug fix: What's all the forking fuss about, ask devs
Blow to bit-spitter 'tis but a flesh wound, claim team
Manic malware Mayhem spreads through Linux, FreeBSD web servers
And how Google could cripple infection rate in a second
Yorkshire cops fail to grasp principle behind BT Fon Wi-Fi network
'Prevent people that are passing by to hook up to your network', pleads plod
Don't look, Snowden: Security biz chases Tails with zero-day flaws alert
Exodus vows not to sell secrets of whistleblower's favorite OS
Researcher sat on critical IE bugs for THREE YEARS
VUPEN waited for Pwn2Own cash while IE's sandbox leaked
prev story

Whitepapers

Top three mobile application threats
Prevent sensitive data leakage over insecure channels or stolen mobile devices.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
The Essential Guide to IT Transformation
ServiceNow discusses three IT transformations that can help CIO's automate IT services to transform IT and the enterprise.